[Etiologic diagnosis of a digital necrosis: essential thrombocythemia. Review of the literature].

The author relates the disease of a man with a digital necrotizing in keeping with an excess of platelets. Clinical, biological and histological study may evolve diagnosis of idiopathic thrombocythemia. The check of concerned literature may specify profile of this disease which agree with platelet side of a myeloproliferative syndrome. Coagulation study is often disappointing but may involve interference of prostaglandins as an intimate mechanism for aggregation and adhesivity of platelets. Clinical course may very easily be supervised with standard medical treatment.